Paracetamol: Haematological reactions including thrombocytopenia, leucopenia, pancytopenia, neutropenia & agranulocytosis; skin rash & other hypersensitivity reactions. Tramadol HCl: Nausea, vomiting, constipation, drowsiness & confusion; difficult micturition, ureteric or biliary spasm; antidiuretic effect; dry mouth, dizziness, sweating, facial flushing, headache, vertigo, bradycardia, tachycardia, palpitations, orthostatic hypotension, hypothermia, restlessness, mood changes, decreased libido or potency, hallucinations & miosis; raised intracranial pressure; muscle rigidity.